The Megaphyll Found in Ferns and Seed Plants Is Thought

question 10

Multiple Choice

The megaphyll found in ferns and seed plants is thought to have evolved

• A) from sterile sporangia.
• B) by the process of mitosis of microphylls.
• C) by the process of heterospory.
• D) as a result of branch flattening and overtopping growth.
• E) spontaneously in multiple lineages.

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Definitions:

AE Curve

The AE curve represents the Aggregate Expenditure in an economy at various levels of income or output, showing the total spending (consumption, investment, government spending, and net exports) at those levels.

Deadweight Loss

A reduction in economic productivity occurring when there is no achievement of equilibrium for a good or service.

Marginal Revenue

The enhanced income derived from peddling an additional unit of a product or service.

Marginal Cost

The increase in total cost that arises from producing one additional unit of a good or service, a critical factor in economic decision-making.